Why would a guy touch you anywhere?

we we're talking about diabetes with a colleague, and I said that I am surprised that I don't have it given that its becoming prevalent. then he all of sudden grabbed my leg and he said that I can wrap my entire hand around your leg.. then he noticed that I looked disgusted that he just grabbed my leg while talking so he later apologized. Was not he being rude?

Why would a guy touch you anywhere?
Post Opinion